A 14-year-old boy went to Highland High, his former school, and began shooting a semiautomatic rifle shortly before classes were scheduled to begin, officials said. A 15-year-old boy was struck in the shoulder.

April 20: Ocala, Florida

A 17-year-old student at Forest High School was shot in the ankle shortly before students were to walk out as part of a national protest against gun violence.. The suspect was a 19-year-old former student.

A person was shot on the campus of Savannah State University and taken to a nearby hospital where he later died. Neither the victim nor the shooter were university students, the college said.

February 14: Parkland, Florida

A 19-year-old man gunned down students and staff with a rifle at Marjory Stoneman Douglas High School in Parkland, slaughtering at least 17 unsuspecting students and adults. The shooter, Nikolas Cruz, had been expelled from the high school over disciplinary problems, officials said.